Using the following data for an unreinforced PCC Pavement slab:■ Design strength f′c = 4,000 psi■ Slab thickness = 12′′■ Standard deviation of f′c obtained from 20 samples = 200 psi■ Ignore any exposure requirement■ Use air-entrained concrete■ Fineness modulus of fine aggregate = 2.60■ Maximum aggregate size = 2′′ and nominal maximum aggregatesize = 11 2′′■ Bulk oven-dry specific gravity of coarse aggregate = 2.6■ Oven-dry rodded density of coarse aggregate = 125 pcfFind the following:a. Required compressive strengthb. w/c ratioc. Coarse aggregate amount (lb/yd3)d. If the w/c ratio is 10% reduced, will the quantity of coarse aggregate increase, decrease or remain the same? Explain your answer.
Using the following data for an unreinforced PCC Pavement slab:
■ Design strength f′c = 4,000 psi
■ Slab thickness = 12′′
■ Standard deviation of f′c obtained from 20 samples = 200 psi
■ Ignore any exposure requirement
■ Use air-entrained concrete
■ Fineness modulus of fine aggregate = 2.60
■ Maximum aggregate size = 2′′ and nominal maximum aggregatesize = 11 2′′
■ Bulk oven-dry specific gravity of coarse aggregate = 2.6
■ Oven-dry rodded density of coarse aggregate = 125 pcf
Find the following:
a. Required compressive strength
b. w/c ratio
c. Coarse aggregate amount (lb/yd3)
d. If the w/c ratio is 10% reduced, will the quantity of coarse aggregate increase, decrease or remain the same? Explain your answer.
Trending now
This is a popular solution!
Step by step
Solved in 5 steps
